Magnum 12 with Walbro carb

[persof 14]

I have a 312-8 with a Kohler magnum 12HP engine that uses a Walbro carburetor.  Please see my attached pic and let me know which is the high-speed needle and which is the low-speed needle.  #1 on obviously the idle speed.  The Kohler manual only shows the somewhat different Kohler carb.

 

Thanks

Francis   

[Hodge71 665]

Thought i had the answer for ya but unfortunately my Walboro is a fixed jet unit and I can't be of assistance. . Someone with may more knowledge will be along to help you I'm sure

[Kai Thomsen 17]

http://gardentractorpullingtips.com/images/walbro.jpg

[rmaynard 16,212]

 Number 1 is the idle speed adjustment, and number 2 is the low speed adjustment, 3 is the main jet

Edited February 2, 2014 by rmaynard

[Wheel-N-It 2,976]

Bob Maynard is correct. You may need to remove both the high speed and low speed needles and clean them, plus take a can of spray brake cleaner and spray down in the passageways. Not the whole can, just a little bit.

[persof 14]

Thanks!

[oaktown1987 82]

All walbro carbs that came on magnums have fixed main jets aka high idle

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They did that for emission purposes

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The k series had Carter's and kohlers later kohler bought rights to carter carbs for the k

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[tunahead72 2,536]

Francis,

 

Look around in the Manuals section for a different Kohler manual.  You should be able to find one that shows both the Kohler and the Walbro carbs.  I know there's an owner's manual for the K-series engines that shows them all, and gives instructions for adjusting them.  I'll check back later and give you a direct link if you don't find one by then.